Conor McGregor 'bumped into' a familiar face as he touched down in LA for the first stop of the press tour ahead of his superfight against Floyd Mayweather next month.

UFC supremo Dana White shared a snap of the duo after getting off their respective planes in California.

McGregor and Mayweather will speak in LA on Tuesday before jetting off to Toronto for another media briefing on Wednesday.

They will then talk in New York on Thursday before finalising the tour on Friday at Wembley Arena in London.

Conor McGregor sparring (Image: thenotoriousmma/Instagram)

McGregor is confident he can cause an upset (Image: Dave Fogarty/Ginger Beard Photography)

Despite having never boxed professionally, McGregor is in bullish mood ahead of the scrap on August 26, telling pals he will KO Mayweather in the fourth round, according to The Sun.

Mayweather, 40, has stepped out of retirement for the big-money showdown, looking to improve his perfect professional record to 50-0.

But Irishman McGregor's coach John Kavanagh insisted: “I can’t envisage another outcome other than Conor stopping him within eight rounds."

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When asked about former boxers and pundits giving his man no chance, he added: “I guess I somewhat understand their point of view, not that I remotely agree with it.

“But if you didn’t have a good understanding of how Conor’s training is normally and you haven’t seen him against good boxers, I can sort of see why they might think that and, I don’t know, I guess boxing is their baby.”